Retrieve a company. Companies are entities managed through your organisation structure that can be associated with organisation nodes.

Related resources are only returned when requested via the include query param:

• To fetch without related resources, omit the include parameter.
• To include related resources, pass a comma-separated list (e.g. organisation_node,bank_account).

🔒 External clients call this endpoint with an OAC (Organisation Access Credentials — ⚠️ Beta) access token carrying the companies:read scope.